Not a BF noob (hey I died first time jumping out a chopper cause I hit '9' for a parachute!!), just have more difficulty seeing with all the clutter and complex graphics, been that way for me even since BF2. Part of that is just knowing the map, knowing where people COULD be to know where to look.
Had the most points being on the rooftops with the rocket launcher and hitting tanks/choppers/etc.
Only played one round, but already the squad size change does seem to impact things, easier to stay in an area and harder to make sure you've cleared everyone out of an area.